Digital Dynamic Wind; Wind Supply - Rodgers Trillium T967 Owner's Manual

6. Rotate the Alpha dial until the desired temperament appears.
7. Press General Cancel ('0') to exit.
When the organ is turned off, temperament reverts to Equal, the default setting.
Also, the instrument can be quickly returned to Equal temperament by holding
!
General Cancel ('0') and momentarily pressing SET. This Reset procedure also
returns MIDI settings and Voice Palette selections to their defaults.

Digital Dynamic Wind

Part of the personality of an individual pipe organ relates to the steadiness of the wind supply to
the pipes. Because air is an elastic medium, there is some amount of give in the wind supply of
every pipe instrument. Some organs exhibit more unsteadiness than others according to the type
of wind regulators used (single or multiple reservoirs, schwimmer regulators, etc.). A small
amount of unsteadiness in the wind helps the listener to identify the sound as that of a wind-
blown instrument, although too much can be distracting. Certain types of music, though, seem to
gain charm from a less-than-perfect wind system.
Another characteristic of pipe organs involves changes in pitch that occur in individual pipes
when playing large numbers of pipes together. These pitch changes are due both to variations in
wind pressure as the wind demand becomes greater and to the influence of the sound from
neighboring pipes. This latter effect is greatest upon large-scale flute voices and least upon
narrow-scaled string voices. Even though this results in significant detuning, the human ear
seems to perceive instead an increase in ensemble effect.
A part of Dimensional Sound Modeling, Rodgers' exclusive Digital Dynamic Wind emulates
these characteristics by modeling the behavior of pipe organ wind regulating devices and the
response of pipes to a slightly unsteady wind supply. Some independent ranks have their own
software reservoir, and each voice is programmed to respond to wind variations in the same way
its equivalent pipe rank or ranks would respond.

Wind Supply

Adjusting the behavior of the organ wind system is accomplished via the Wind Supply menu
item in the Pipe Modeling menu. Wind Supply operates much like pipe instruments. In the
Flexible position, the wind has a noticeable unsteadiness, or a slight sag of the initial pitch, in the
playing of rapid passages or large chords. The Normal position reduces this somewhat, and the
Fixed position makes the wind steady under all conditions.
P i p e M o d e l i n g
T e m p e r a m e n t
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